login&register

src/main/java/dev/dao/UserDao.java

@@ -1,23 +1,69 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.User;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import org.mindrot.jbcrypt.BCrypt;
+
 public class UserDao {
 
     public boolean save(User user) {
 
-        // TODO:
-        // Insert user into database
+        String hashedPassword = BCrypt.hashpw(user.getPassword(), BCrypt.gensalt());
+        String query ="INSERT INTO users (username, password_hash, email) VALUES (?, ?, ?)";
+
+        try(Connection c = DatabaseConnection.getConnection();
+            PreparedStatement pst = c.prepareStatement(query)) {
+
+            pst.setString(1 , user.getUsername());
+            pst.setString(2 , hashedPassword);
+            pst.setString(3 , user.getEmail());
+
+
+            int result = pst.executeUpdate();
+            if(result==1){
+                return true;
+            }
+
+
+        } catch (SQLException e) {
+            System.out.println(e.getMessage());
+        };
 
         return false;
     }
 
-    public User findByUsername(String username) {
+    public User findByUsername(String userName) {
 
-        // TODO:
-        // Find a user by username
+        String query = "SELECT * FROM users WHERE username = ?";
+
+        try (Connection c = DatabaseConnection.getConnection();
+             PreparedStatement pst = c.prepareStatement(query)) {
+
+            pst.setString(1, userName);
+
+            try (ResultSet rst = pst.executeQuery()) {
+                if (rst.next()) {
+                    User user = new User(rst.getInt("id"),
+                            rst.getString("username"),
+                            rst.getString("password_hash"),
+                            rst.getString("email"));
+                    return user;
+                }
+
+            }
+
+
+        } catch (SQLException e) {
+            System.out.println(e.getMessage());
+        }
 
         return null;
+
     }
 
 }